Re: SL6 to F16??

Pete Travis <me <at> petetravis.com>
2011-11-01 00:55:20 GMT

On Oct 31, 2011 2:58 PM, "Joe Zeff" <joe <at> zeff.us> wrote:
>
> On 10/31/2011 01:06 PM, Beartooth wrote:
> > But something is still wrong. It gets part way through booting,
> > then gives me an error box saying it failed to load session "gdm-shell"
> > and a Log Out button. Clicking the button just takes you back to the same
> > error box.
>
> It sounds as though you don't have a display manager installed to handle
> logging in. Try going to an alternate tty with Ctrl-F2, logging in and
> running startx. If that works, try installing gdm, logging out and
> rebooting.
> --

You might also want to verify the files you restored to /home are properly owned. I don't recall how SL behaves offhand, but with F16 UIDs started at 1000 instead of 500 as in the past. A simple "chown -R user /home/user " should take care of any permissions problems migration might lead to.

localhost udp bind: address in use

Michael D. Berger <m.d.berger <at> ieee.org>
2011-11-01 01:20:08 GMT

I have some complex multi-thread C++ code in which I do
some internal signaling with udp sockets:
snd: 127.0.0.1:6501
rcv: 127.0.0.1:6502
On my new F15_64 box, I usually get:
errno=98=Address already in use
in response to the bind command when I bring up the snd
socket (which is first up) even when I just come up from
power off.
Rarely, it works. I have no idea why.
If I ignore the 98 error, I get a write error on the socket.
Even when it fails,
netstat -uap
shows the socket, which is not a surprise, and it
is not there when the program is not up.
Now on my old CentOS 5_32 box, the same code
(but, of course, compiled for 32) works with no
problem. I can start and stop it rapidly with no
problem.
Thanks for your suggestions.
Mike.
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m.d.berger <at> ieee.org
http://www.rosemike.net/--
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Re: localhost udp bind: address in use

Is ipv6 enabled?
Any chance it is binding to loopback using an ipv6 loopback address, and
then finding it is already bound using the ipv4 equivalent?
On 10/31/2011 09:20 PM, Michael D. Berger wrote:
> I have some complex multi-thread C++ code in which I do
> some internal signaling with udp sockets:
> snd: 127.0.0.1:6501
> rcv: 127.0.0.1:6502
>
> On my new F15_64 box, I usually get:
> errno=98=Address already in use
> in response to the bind command when I bring up the snd
> socket (which is first up) even when I just come up from
> power off.
>
> Rarely, it works. I have no idea why.
>
> If I ignore the 98 error, I get a write error on the socket.
>
> Even when it fails,
> netstat -uap
> shows the socket, which is not a surprise, and it
> is not there when the program is not up.
>
> Now on my old CentOS 5_32 box, the same code
> (but, of course, compiled for 32) works with no
> problem. I can start and stop it rapidly with no
> problem.
>
> Thanks for your suggestions.
> Mike.
> --
> Michael D. Berger
> m.d.berger <at> ieee.org
> http://www.rosemike.net/
>
>
>
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Constructing Grid on Fedora

Dear List,
I have a cluster of several PCs, each is running Fedora, either 14 or 15.
I want to make this PCs grid enabled, so I installed globus (
http://www.globus.org/ ) and made a server with a global IP and with
a subdomain. My main objective is to be able to run parallel
programming (mpi), harnessing the idle CPUs of onlines nodes.
The stage at a moment, I have successfully set up simple-CA and the
GSI of the server.
Globus commands works fine, for example:
++++
$ globus-hostname-lookup fedora.org
Resolving address (fedora.org)...
-------------------------------
Numeric address: 67.40.49.xxx
Expected DN suffix: /CN=host/hoxx.trippy.org
++++
$ grid-proxy-init
Your identity: /O=Grid/OU=GlobusTest/OU=simpleCA-localhost.localdomain/OU=localdomain/CN=
Abu Attar
Enter GRID pass phrase for this identity:
Creating proxy ............................................ Done
Your proxy is valid until: Wed Nov 2 05:01:04 2011
++++++
I tried but failed to copy a file from one node to a server.
$ globus-url-copy file:///home/username/Grid/Codes/cpi.c gsiftp://domainname/
The message is as follows,
error: globus_xio: Unable to connect to domainname:2811
globus_xio: System error in connect: No route to host
globus_xio: A system call failed: No route to host
It seems something to do with the port 2811. Checking /etc/services
of the server gave the port number and the protocol
++++
root$ less /etc/services | grep gsi
gsigatekeeper 2119/udp # GSIGATEKEEPER
gsiftp 2811/tcp # GSI FTP
gsiftp 2811/udp # GSI FTP
gsidcap 22128/tcp # GSI dCache Access Protocol
++++
As I do not have any experience, I have no idea how to fix it.
I mainly rely on internet searching, but still can not find the answer.
I expect from this list some suggestions or any comment.
Thank you very much in advance.
with best,
AA
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Re: Constructing Grid on Fedora

On 11/01/2011 10:11 AM, Abu Attar Musharih wrote:
> Dear List,
>
> I have a cluster of several PCs, each is running Fedora, either 14 or 15.
> I want to make this PCs grid enabled, so I installed globus (
> http://www.globus.org/ ) and made a server with a global IP and with
> a subdomain. My main objective is to be able to run parallel
> programming (mpi), harnessing the idle CPUs of onlines nodes.
Hi Abu Attar Musharih,
First of all, I don't think that a grid is the right instrument for
running processes using a MPI model (this is more thread based, or, if
using a cluster, based on a RPC model for example). Or look at
*www.mosix.org*.
For cluster software, you could use Scientific linux or Rocks Clusters
Linux. I made good experience in managing a cluster with Rocks Clusters
Linux, based on CentOS (www.rocksclusters.org).
Additionally, in my opinion, the Fedora user list is not really a good
contact for your grid question. I'm sure there is a appropriate Q&A page
at globus.org (the messages listed below are not system specific enough)
- it seems to be a middleware problem.
Kind regards
Joachim Backes
>
> The stage at a moment, I have successfully set up simple-CA and the
> GSI of the server.
>
> Globus commands works fine, for example:
>
> ++++
> $ globus-hostname-lookup fedora.org
> Resolving address (fedora.org)...
> -------------------------------
> Numeric address: 67.40.49.xxx
> Expected DN suffix: /CN=host/hoxx.trippy.org
> ++++
>
> $ grid-proxy-init
> Your identity: /O=Grid/OU=GlobusTest/OU=simpleCA-localhost.localdomain/OU=localdomain/CN=
> Abu Attar
> Enter GRID pass phrase for this identity:
> Creating proxy ............................................ Done
> Your proxy is valid until: Wed Nov 2 05:01:04 2011
>
> ++++++
>
> I tried but failed to copy a file from one node to a server.
>
> $ globus-url-copy file:///home/username/Grid/Codes/cpi.c gsiftp://domainname/
>
> The message is as follows,
>
> error: globus_xio: Unable to connect to domainname:2811
> globus_xio: System error in connect: No route to host
> globus_xio: A system call failed: No route to host
>
> It seems something to do with the port 2811. Checking /etc/services
> of the server gave the port number and the protocol
> ++++
> root$ less /etc/services | grep gsi
>
> gsigatekeeper 2119/udp # GSIGATEKEEPER
> gsiftp 2811/tcp # GSI FTP
> gsiftp 2811/udp # GSI FTP
> gsidcap 22128/tcp # GSI dCache Access Protocol
> ++++
>
> As I do not have any experience, I have no idea how to fix it.
> I mainly rely on internet searching, but still can not find the answer.
>
> I expect from this list some suggestions or any comment.
> Thank you very much in advance.
>
> with best,
> AA
--
Joachim Backes <joachim.backes <at> rhrk.uni-kl.de>
http://www.rhrk.uni-kl.de/~backes

Re: Constructing Grid on Fedora

Marko Vojinovic <vvmarko <at> gmail.com>
2011-11-01 14:18:02 GMT

On Tuesday 01 November 2011 09:11:01 Abu Attar Musharih wrote:
> I have a cluster of several PCs, each is running Fedora, either 14 or 15.
> I want to make this PCs grid enabled, so I installed globus (
> http://www.globus.org/ ) and made a server with a global IP and with
> a subdomain. My main objective is to be able to run parallel
> programming (mpi), harnessing the idle CPUs of onlines nodes.
Depending on what you actually want to do, globus may or may not be the right
tool for the job. What exactly do you want to do, for what purpose, and what
is your hardware setup?
> I tried but failed to copy a file from one node to a server.
>
> $ globus-url-copy file:///home/username/Grid/Codes/cpi.c
> gsiftp://domainname/
>
> The message is as follows,
>
> error: globus_xio: Unable to connect to domainname:2811
> globus_xio: System error in connect: No route to host
> globus_xio: A system call failed: No route to host
>
> It seems something to do with the port 2811.
This can be a number of things. However, in globus deployment (especially if
you are doing it for the first time), the *number**one* culprit is always the
firewall. Globus uses *a**lot* of custom ports, and it expects all of them to
be available.
So, as a first step (and for testing purposes only!!!) take down the firewall on
both machines (the client and the server), as
# service iptables stop
and retry the gsiftp. Be aware that shutting down the firewall is VERY
DANGEOROUS and should be brought back up as soon as possible. However, when
debugging Globus, it is the only reasonable way to check what is wrong.
If gsiftp is successful with firewall down, then do some research on what ports
you need to open up and customize your firewall config. Expect to spend
considerable time on that, since the config will be very, very custom.
If it isn't the firewall, then there is something wrong with some part of your
globus installation. It can be a number of things.
You are better off asking on one of the globus support mailing lists (I am not
actively following any of those anymore, so cannot point you exactly). I doubt
you will find many people with Globus experience on the Fedora list.
HTH,
Marko
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SUCCESS! Re: SL6 to F16??

Beartooth <beartooth <at> comcast.net>
2011-11-01 15:43:54 GMT

On Mon, 31 Oct 2011 18:30:24 -0400, Bob Goodwin wrote:
> On 31/10/11 17:01, Beartooth wrote:
>> How do I remind it to boot to xfce instead of gnome??
> Try startxfce4 or startxfce ...
Plain startxfce just got "command not found" -- but startxfce4
hit the jackpot. I'm on the machine, and have copied a couple of my home
folders to it (such as .pan2 in order to post).
One small snag, new to me: I plugged the external drive onto
which I had copied /home back into the USB port. It shows the various
partitions on that drive, but neither automounts them nor lets me mount
them. What have I done wrong?
--
Beartooth Staffwright, Neo-Redneck Not Quite Clueless Power User
I have precious (very precious!) little idea where up is.
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